3.9 Mt/a渣油加氢装置运行情况分析

介绍了中国石化上海石油化工股份有限公司3.9 Mt/a渣油加氢装置RHT系列催化剂中期工业标定情况、RHT系列催化剂日常运行数据、装置能耗及装置运行存在的问题。工业标定及日常运行数据结果表明,在冷高压分离器压力为15.5MPa、体积空速为0.2h-1、较低的反应器床层平均温度、较小的反应器径向温差、平稳的反应器压降条件下,渣油加氢装置能够为下游的催化裂化装置提供低硫、低金属、低残炭的加氢重油原料。中期工业标定期间RHT系列催化剂的平均脱硫率为89.82%,平均降残炭率为65.01%,平均脱金属率为86.39%,说明RHT系列加氢精制催化剂具有较高的脱硫、降残炭、脱金属活性。同时,日常运行数据表明RHT系列加氢精制催化剂具有较低的失活率,能够满足催化剂长周期平稳运行的需要。目前装置由于循环氢压缩机转数无法调节,造成装置的两个反应系列不能达到理想的氢油比,将成为渣油加氢装置满负荷运行至催化剂末期时的最大瓶颈。

OPERATION ANALYSIS OF 3.9 Mt/a RESIDUE HYDROTREATING UNIT

The calibration results，daily operation data, unit energy consumption，and the problems in operation of 3.9 Mt/a residue hydrotreating unit with RHT series catalysts in Shanghai petrochemical Co. LTD. was introduced. Industrial operation shows that RHT series catalysts have higher HDS, HDCCR, and HDM activity as well as lower deactivation rate and can provide RFCC feedstocks with low sulfur, low carbon and low metal under the reaction conditions of 15.5 MPa in cold high pressure separator and space velocity 0.2 h-1. The mid-term calibration results show that the average removal rates of HDS, HDCCR, and HDM are 89.82%, 65.01%, 86.39% respectively. The unit runs smoothly with lower reaction temperature, less radical temperature difference and pressure drop rising and can meet the requirements for long term operation. The problem is that the two series of residue hydrotreating reactor system cannot reach the ideal hydrogen to oil ratio due to the difficulties to adjust revolutions of circulating hydrogen compressor, which may become the bottleneck for full capacity operation at the end-of-run. Key Words：residue hydrotreating; catalyst; industrial calibration; application